shield pin??

[swingbeepdig]

Its a little bigger than a quarter.

 

[tamrock]

French fleur-de-lis' shield, Looks old? Fleur-de-lis - Wikipedia, the free encyclopedia

 

[BigBobBow]

They are often found in Civil War camp areas. The studs were punched through the leather much like a rivet. Cool find. You'll see many styles of those. Used as a harness stud

 

[nhbenz]

Saddle boss? A lot of these, with the same decoration, have been posted here and now I can't recall for sure what the final word was, except non-military horse related decoration. Someone posted concrete proof at one point, but I can't find the thread with it.

 

[Silver Searcher]

It's a Shield Shaped Harness Mount, the design in the middle is the Prince of Wales feathers, perhaps from a Welsh regiment. Good find

SS